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Priority to ES128823UpriorityCriticalpatent/ES128823U/es
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Molde para canalizaciones de agua de riego caracterizado esencialmente por el hecho de que los dos semimoldes que lo constituyen están provistos de medios de articulación entre si y de los correspondientes elementes de cierre siendo susceptible dicho molde de efectuar las piezas de canalización mediante cualquier clase de material cementoso arcilloso o similar.
ES128823U1967-04-041967-04-04Molde para canalizaciones de agua de riego
PendingES128823U
(es)
Fremgangsmåde til fremstilling af plastrør, hvis væg indeholder fibermateriale og kornformigt materiale i matrix af hærdet polymermateriale, og som har muffe- og tapsamlinger.